NCERT Solutions For Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.3

Ex 8.3 Class 10 Maths Question 1.

Evaluate:

Solution for Ex 8.3 Class 10 Maths Question 1

Solution for Ex 8.3 Class 10 Maths Question 1
 

Ex 8.3 Class 10 Maths Question 2.

Show that:
(i) tan 48° tan 23° tan 42° tan 67° = 1
(ii) cos 38° cos 52° – sin 38° sin 52° = 0

Solution for Ex 8.3 Class 10 Maths Question 2

Solution for Ex 8.3 Class 10 Maths Question 2
 

Ex 8.3 Class 10 Maths Question 3.

If tan 2A = cot (A – 18°), where 2A is an acute angle, find the value of A.

Solution for Ex 8.3 Class 10 Maths Question 3

Solution for Ex 8.3 Class 10 Maths Question 3
 

Ex 8.3 Class 10 Maths Question 4.

If tan A = cot B, prove that A + B = 90°.

Solution for Ex 8.3 Class 10 Maths Question 4

Solution for Ex 8.3 Class 10 Maths Question 4
 

Ex 8.3 Class 10 Maths Question 5.

If sec 4A = cosec (A – 20°), where 4A is an acute angle, find the value of A.

Solution for Ex 8.3 Class 10 Maths Question 5

Solution for Ex 8.3 Class 10 Maths Question 5
 

Ex 8.3 Class 10 Maths Question 6.

If A, B and C are interior angles of a triangle ABC, then show that: sin

Solution for Ex 8.3 Class 10 Maths Question 6

Solution for Ex 8.3 Class 10 Maths Question 6
 

Ex 8.3 Class 10 Maths Question 7.

Express sin 61° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°.

Solution for Ex 8.3 Class 10 Maths Question 7

Solution for Ex 8.3 Class 10 Maths Question 7
 

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